1 /*****************************************************************************
2 * fake.c: decoder reading from a fake stream, outputting a fixed image
3 *****************************************************************************
4 * Copyright (C) 2005-2009 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Jean-Paul Saman <jpsaman at m2x dot nl>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_codec.h>
36 #include <vlc_image.h>
37 #include <vlc_filter.h>
39 /*****************************************************************************
41 *****************************************************************************/
42 static int OpenDecoder ( vlc_object_t * );
43 static void CloseDecoder ( vlc_object_t * );
45 static picture_t *DecodeBlock ( decoder_t *, block_t ** );
46 static int FakeCallback( vlc_object_t *, char const *,
47 vlc_value_t, vlc_value_t, void * );
49 /*****************************************************************************
51 *****************************************************************************/
52 #define FILE_TEXT N_("Image file")
53 #define FILE_LONGTEXT N_( \
54 "Path of the image file for fake input." )
55 #define RELOAD_TEXT N_("Reload image file")
56 #define RELOAD_LONGTEXT N_( \
57 "Reload image file every n seconds." )
58 #define WIDTH_TEXT N_("Video width")
59 #define WIDTH_LONGTEXT N_( \
60 "Output video width." )
61 #define HEIGHT_TEXT N_("Video height")
62 #define HEIGHT_LONGTEXT N_( \
63 "Output video height." )
64 #define KEEP_AR_TEXT N_("Keep aspect ratio")
65 #define KEEP_AR_LONGTEXT N_( \
66 "Consider width and height as maximum values." )
67 #define ASPECT_RATIO_TEXT N_("Background aspect ratio")
68 #define ASPECT_RATIO_LONGTEXT N_( \
69 "Aspect ratio of the image file (4:3, 16:9). Default is square pixels." )
70 #define DEINTERLACE_TEXT N_("Deinterlace video")
71 #define DEINTERLACE_LONGTEXT N_( \
72 "Deinterlace the image after loading it." )
73 #define DEINTERLACE_MODULE_TEXT N_("Deinterlace module")
74 #define DEINTERLACE_MODULE_LONGTEXT N_( \
75 "Deinterlace module to use." )
76 #define CHROMA_TEXT N_("Chroma used")
77 #define CHROMA_LONGTEXT N_( \
78 "Force use of a specific chroma for output. Default is I420." )
80 static const char *const ppsz_deinterlace_type[] =
82 "deinterlace", "ffmpeg-deinterlace"
86 set_category( CAT_INPUT )
87 set_subcategory( SUBCAT_INPUT_VCODEC )
88 set_shortname( N_("Fake") )
89 set_description( N_("Fake video decoder") )
90 set_capability( "decoder", 1000 )
91 set_callbacks( OpenDecoder, CloseDecoder )
92 add_shortcut( "fake" )
94 add_file( "fake-file", "", NULL, FILE_TEXT,
95 FILE_LONGTEXT, false )
96 add_integer( "fake-file-reload", 0, NULL, RELOAD_TEXT,
97 RELOAD_LONGTEXT, false )
98 add_integer( "fake-width", 0, NULL, WIDTH_TEXT,
99 WIDTH_LONGTEXT, true )
100 add_integer( "fake-height", 0, NULL, HEIGHT_TEXT,
101 HEIGHT_LONGTEXT, true )
102 add_bool( "fake-keep-ar", false, NULL, KEEP_AR_TEXT, KEEP_AR_LONGTEXT,
104 add_string( "fake-aspect-ratio", "", NULL,
105 ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, true )
106 add_bool( "fake-deinterlace", false, NULL, DEINTERLACE_TEXT,
107 DEINTERLACE_LONGTEXT, false )
108 add_string( "fake-deinterlace-module", "deinterlace", NULL,
109 DEINTERLACE_MODULE_TEXT, DEINTERLACE_MODULE_LONGTEXT,
111 change_string_list( ppsz_deinterlace_type, 0, 0 )
112 add_string( "fake-chroma", "I420", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
126 /*****************************************************************************
127 * OpenDecoder: probe the decoder and return score
128 *****************************************************************************/
129 static int OpenDecoder( vlc_object_t *p_this )
131 decoder_t *p_dec = (decoder_t*)p_this;
132 image_handler_t *p_handler;
133 video_format_t fmt_in, fmt_out;
135 char *psz_file, *psz_chroma, *psz_string;
140 if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','a','k','e') )
145 p_dec->p_sys = calloc( 1, sizeof( *p_dec->p_sys ) );
149 psz_file = var_CreateGetNonEmptyStringCommand( p_dec, "fake-file" );
152 msg_Err( p_dec, "specify a file with --fake-file=..." );
153 free( p_dec->p_sys );
157 memset( &fmt_in, 0, sizeof(fmt_in) );
158 memset( &fmt_out, 0, sizeof(fmt_out) );
160 i_int = var_CreateGetIntegerCommand( p_dec, "fake-file-reload" );
163 p_dec->p_sys->b_reload = true;
164 p_dec->p_sys->i_reload = (mtime_t)(i_int * 1000000);
165 p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
168 psz_chroma = var_CreateGetString( p_dec, "fake-chroma" );
169 fmt_out.i_chroma = vlc_fourcc_GetCodecFromString( VIDEO_ES, psz_chroma );
170 if( !fmt_out.i_chroma )
172 msg_Warn( p_dec, "Invalid chroma (%s). Using I420.", psz_chroma );
173 fmt_out.i_chroma = VLC_CODEC_I420;
177 var_Create( p_dec, "fake-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
178 var_Create( p_dec, "fake-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
179 psz_string = var_CreateGetString( p_dec, "fake-aspect-ratio" );
183 char *psz_parser = strchr( psz_string, ':' );
187 *psz_parser++ = '\0';
188 i_aspect = atoi( psz_string )
189 * VOUT_ASPECT_FACTOR / atoi( psz_parser );
194 b_keep_ar = var_CreateGetBool( p_dec, "fake-keep-ar" );
198 fmt_out.i_width = var_GetInteger( p_dec, "fake-width" );
199 fmt_out.i_height = var_GetInteger( p_dec, "fake-height" );
202 p_handler = image_HandlerCreate( p_dec );
203 p_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
204 image_HandlerDelete( p_handler );
206 if ( p_image == NULL )
208 msg_Err( p_dec, "unable to read image file %s", psz_file );
210 free( p_dec->p_sys );
213 msg_Dbg( p_dec, "file %s loaded successfully", psz_file );
219 picture_t *p_old = p_image;
220 int i_width, i_height;
222 i_width = var_GetInteger( p_dec, "fake-width" );
223 i_height = var_GetInteger( p_dec, "fake-height" );
225 if ( i_width && i_height )
227 int i_image_ar = fmt_out.i_width * VOUT_ASPECT_FACTOR
229 int i_region_ar = i_width * VOUT_ASPECT_FACTOR / i_height;
232 if ( i_aspect == i_image_ar )
234 fmt_out.i_width = i_width;
235 fmt_out.i_height = i_height;
237 else if ( i_image_ar > i_region_ar )
239 fmt_out.i_width = i_width;
240 fmt_out.i_height = i_width * VOUT_ASPECT_FACTOR
242 i_aspect = i_image_ar;
246 fmt_out.i_height = i_height;
247 fmt_out.i_width = i_height * i_image_ar
248 / VOUT_ASPECT_FACTOR;
249 i_aspect = i_image_ar;
252 p_handler = image_HandlerCreate( p_dec );
253 p_image = image_Convert( p_handler, p_old, &fmt_in, &fmt_out );
254 image_HandlerDelete( p_handler );
256 if ( p_image == NULL )
258 msg_Warn( p_dec, "couldn't load resizing module" );
264 picture_Release( p_old );
271 fmt_out.i_sar_num = i_aspect * fmt_out.i_height;
272 fmt_out.i_sar_den = VOUT_ASPECT_FACTOR * fmt_out.i_width;
276 fmt_out.i_sar_num = 1;
277 fmt_out.i_sar_den = 1;
280 if( var_CreateGetBool( p_dec, "fake-deinterlace" ) )
282 picture_t *p_old = p_image;
284 psz_string = var_CreateGetString( p_dec, "fake-deinterlace-module" );
286 p_handler = image_HandlerCreate( p_dec );
287 p_image = image_Filter( p_handler, p_old, &fmt_out, psz_string );
288 image_HandlerDelete( p_handler );
291 if ( p_image == NULL )
293 msg_Warn( p_dec, "couldn't load deinterlace module" );
298 picture_Release( p_old );
302 /* Set output properties */
303 p_dec->fmt_out.i_cat = VIDEO_ES;
304 p_dec->fmt_out.i_codec = fmt_out.i_chroma;
305 p_dec->fmt_out.video = fmt_out;
308 p_dec->pf_decode_video = DecodeBlock;
310 p_dec->p_sys->p_image = p_image;
311 vlc_mutex_init( &p_dec->p_sys->lock );
313 /* Add the callback when every variables are available */
314 var_AddCallback( p_dec, "fake-file", FakeCallback, p_dec );
315 var_AddCallback( p_dec, "fake-file-reload", FakeCallback , p_dec );
320 /****************************************************************************
321 * DecodeBlock: the whole thing
322 ****************************************************************************/
323 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
325 decoder_sys_t *p_sys = (decoder_sys_t*) p_dec->p_sys;
328 if( pp_block == NULL || !*pp_block ) return NULL;
329 p_pic = decoder_NewPicture( p_dec );
332 msg_Err( p_dec, "cannot get picture" );
336 if( p_sys->b_reload && (mdate() >= p_sys->i_next) )
338 var_TriggerCallback( p_dec, "fake-file" );
340 p_sys->i_next = (mtime_t)(p_sys->i_reload + mdate());
342 vlc_mutex_lock( &p_dec->p_sys->lock );
343 picture_Copy( p_pic, p_dec->p_sys->p_image );
344 vlc_mutex_unlock( &p_dec->p_sys->lock );
346 p_pic->date = (*pp_block)->i_pts;
349 block_Release( *pp_block );
355 /*****************************************************************************
356 * CloseDecoder: fake decoder destruction
357 *****************************************************************************/
358 static void CloseDecoder( vlc_object_t *p_this )
360 decoder_t *p_dec = (decoder_t *)p_this;
361 picture_t *p_image = p_dec->p_sys->p_image;
363 var_DelCallback( p_dec, "fake-file", FakeCallback, p_dec );
364 var_DelCallback( p_dec, "fake-file-reload", FakeCallback , p_dec );
366 if( p_image != NULL )
367 picture_Release( p_image );
369 vlc_mutex_destroy( &p_dec->p_sys->lock );
370 free( p_dec->p_sys );
373 /*****************************************************************************
374 * FakeCallback: Image source change callback.
375 *****************************************************************************/
376 static int FakeCallback( vlc_object_t *p_this, char const *psz_var,
377 vlc_value_t oldval, vlc_value_t newval,
380 VLC_UNUSED(p_this); VLC_UNUSED(oldval);
381 decoder_t *p_dec = (decoder_t *)p_data;
383 if( !strcmp( psz_var, "fake-file" ) )
385 image_handler_t *p_handler;
386 picture_t *p_new_image;
387 video_format_t fmt_in, fmt_out;
388 char *psz_file = newval.psz_string;
391 vlc_mutex_lock( &p_dec->p_sys->lock );
392 p_image = p_dec->p_sys->p_image;
394 if( !psz_file || !*psz_file )
396 msg_Err( p_dec, "fake-file value must be non empty." );
397 vlc_mutex_unlock( &p_dec->p_sys->lock );
400 msg_Dbg( p_dec, "Changing fake-file to %s.", psz_file );
402 memset( &fmt_in, 0, sizeof(fmt_in) );
403 fmt_out = p_dec->fmt_out.video;
404 p_handler = image_HandlerCreate( p_dec );
405 p_new_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
406 image_HandlerDelete( p_handler );
410 msg_Err( p_dec, "error while reading image (%s)", psz_file );
411 vlc_mutex_unlock( &p_dec->p_sys->lock );
415 p_dec->p_sys->p_image = p_new_image;
416 picture_Release( p_image );
417 vlc_mutex_unlock( &p_dec->p_sys->lock );
419 else if( !strcmp( psz_var, "fake-file-reload" ) )
421 if( newval.i_int > 0)
423 p_dec->p_sys->b_reload = true;
424 p_dec->p_sys->i_reload = (mtime_t)(newval.i_int * 1000000);
425 p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
429 p_dec->p_sys->b_reload = false;